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To know the quantum mechanical state of a system implies, in general, only statistical restrictions on the results of measurements. It seems interest… - John Stewart Bell
" "To know the quantum mechanical state of a system implies, in general, only statistical restrictions on the results of measurements. It seems interesting to ask if this statistical element be thought of as arising, as in classical statistical mechanics, because the states in question are averages over better defined states for which individually the results would be quite determined. These hypothetical 'dispersion free' states would be specified not only by the quantum mechanical state vector but also by additional 'hidden variables' - 'hidden' because if states with prescribed values of these variables could actually be prepared, quantum mechanics would be observably inadequate.
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About John Stewart Bell
John Stewart Bell (June 28 1928 – October 10 1990) was an Irish physicist who worked in the field of particle physics at CERN, and who developed one of the most important theorems of quantum physics, Bell's Theorem.
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Alternative Names:
John S. Bell
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J. S. Bell
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Additional quotes by John Stewart Bell
Einstein said that it is theory which decides what is ''. I think he was right—'observation' is a complicated and theory-laden business. Then that notion should not appear in the formulation of fundamental theory. Information? Whose information? Information about what? On this list of bad words from good books, the worst of all is 'measurement'. It must have a section to itself.
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